Bombing a civilian population

Bombing a civilian population has generally been considered unjustifiable in the industrialized West, especially in the period beginning a decade or two after the atomic bombing of Hiroshima and Nagasaki ended World War II. Yet, in World War I, "It was the Germans who first grasped the psychological implications of bombing a civilian population." At that time, "... no one ever believed that cities were off limits for bombing; they had too many industrial sites and government offices that were potential targets."[1]